Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value of Financial Instruments [Abstract]

Carrying Amounts of Financial Instruments

	As of December 31, 2018				As of December 31, 2017
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Cash and cash equivalents	$	219,408	$	219,408	$	197,337	$	197,337
Restricted cash		53,726		53,726		46,012		46,012
Notes receivable, net		439,167		537,000		426,858		525,000
Lines-of-credit, notes payable, and
receivable-backed notes payable		592,322		596,900		521,312		529,400
Junior subordinated debentures		71,323		87,000		70,384		88,500